Question

 21

Solution

Correct option is

42

and when n is not a multiple of 3, then 

                    

This means that in the given series 7 brackets have value 4 each and the remaining 14 brackets have value 1 each. So, the sum of the series 

SIMILAR QUESTIONS

Q1

The solution of the equation | z | – z = 1 + 2i is

Q2

Among the complex numbers z satisfying the condition  the number having the least positive argument is

Q3

The equation where b is a non-zero complex constant and c is real, represents

Q4

Given that the equation  where p, q, r, s are non-zero has a real root. Then

Q5

In a geometrical progression first tern and common ratio are both  Then the absolute value of the nth term of the progression is

Q7

     

     

Q8

 

 

Q9

If z1 and z2 be two complex numbers such that |z1 + z2| = |z1 – z2| then a value of amp z1 – z2 is equal to

Q10